Which question cannot be answered through making measurements?
A. How much has the honeybee population declined in North
America?
B. How does a decline in honeybees affect the pollination of crops?
C. Should humans stop using chemicals that harm honeybees?
D. Which chemicals produced by humans cause harm to honeybees?
Answer: C. Should humans stop using chemicals that harm honeybees?
Explanation: Just took the test
The question cannot be answered through making measurements is
Should humans stop using chemicals that harm honeybees?So, option C is correct one.
How chemicals harms the honeybees?The pesticides most harmful for the honeybees.The bees are mostly exposed by residual found in nectar of plants and in water.Mainly, diazinon, imidan, malathion and sevin are the chemicals which is harmful for the honeybees.To learn more about chemicals,
https://brainly.com/question/23693316
#SPJ2
how many atoms are there in Cu₂S?
Answer:
3
Explanation:
There are 2 copper atoms because there is a subscript of 2 that comes after it. There is one Sulfur atom.
Hope this helps and good luck with your assignment. (please mark me brainliest if possible).
Element in the periodic table are arranged by
elements in the periodic table are arranged by the atomic number of the element
Answer:
The isotope carbon-14 has 6 protons and an atomic mass of 14. Carbon-14
Explanation:
A student is asked to model gas pressure using two walls and a ball connected to a string, as shown. The ball represents a gas particle. The student swings the ball so it hits the two walls
alternately, How should the student change the setup to show an increase in pressure caused by an increase in temperature?
Answer:
ummm i think move the two walls together
Explanation:
hope this helps
10 pts
A pitcher throws a baseball with a velocity of 33 m/s. If the ball has a mass of 4 kg, how
much kinetic energy does the ball have?
Answer:
The answer is
2178 JExplanation:
The kinetic energy of an object given it's mass and velocity can be found by using the formula
[tex]KE = \frac{1}{2} m {v}^{2} \\ [/tex]
where
m is the mass
v is the velocity
From the question
m = 4 kg
v = 33 m/s
The kinetic energy is
[tex]KE = \frac{1}{2} \times 4 \times {33}^{2} \\ = 2 \times 1089 \\ = 2178 \: \: \: \: \: \: \: \: [/tex]
We have the final answer as
2178 JHope this helps you
Answer:
2,178J
Explanation:
The formula is [ KE = 1/2mv² ] where m = mass and v = velocity.
KE = 1/2(4)(33)²
KE = 1/2(4)(1089)
KE = 1/2(4356)
KE = 2178
Best of Luck!
Show a numerical setup for calculating the quantity of heat in joules required to completely vaporize 102.3 grams of H2O(l) at 100°C and 1.0 atm.
Answer:
The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
Explanation:
The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:
[tex] q = m*\Delta H_{v} [/tex]
Where:
q: is the heat
ΔHv: is the heat of vaporization of water = 2260 J/g
m: is the mass = 102.3
[tex]q = m*\Delta H_{v} = 102.3 g*2260 J/g = 231198 J[/tex]
Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
I hope it helps you!
The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:
[tex]q=m\times H_v[/tex].....(1)
Here, q is the heat
[tex]H_{v}[/tex]: is the heat of vaporization of water = 2260 J/g
m: is the mass = 102.3 g
Substitute the value in equation (1) as follows:-
[tex]q=102.3\ g\times2260\ J/g\\\\=231198\ J[/tex]
Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
To know more about:-
brainly.com/question/12625048
If you have an initial water level in a graduated cylinder of 17 mL, and the final water level after placing a 2g aluminum piece in is 20 mL, what is the density of the aluminum in g/mL?
Formula:? Work:? Answer:?
Answer:
The answer is
0.67 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 20 mL - 17 mL = 3 mL
The density is
[tex]density = \frac{2}{3} \\ = 0.6666666...[/tex]
We have the final answer as
0.67 g/mLHope this helps you
Answer:
0.67g/mL
Explanation:
The formula is [ d = m/v ] where m = mass and v = volume
Find the volume.
20 - 17 = 3
Find the density.
d = 2/3
d ≈ 0.67
Best of Luck!
A scientist is conducting an experiment to determine if eating chocolate ice cream helps students perform better on
science tests. She gives one group of students ice cream but does not give ice cream to another group of students.
She gives the same test out to all of the students and records their scores. In this experiment, the dependent variable
is the
Answer:
I think another group who didn't receive ice creams
What are examples of how science has influenced technology?
Explanation:
Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.
A student pushes against a wall with 30 Newton’s of force and the wall does not move
Answer:
you can't go through a solid unless you broke the atoms in the wall
True
or False: A force has to touch an object in order to affect it.
Hellppp
Which part of the wave is changed when there is interference?
A. the amplitude
B. the crest
C. the trough
D. the wavelength
Answer:
A. the amplitude
Explanation:
Hopes this helps if not then dang.
PLEASE HELP ASAP!
what are the products of radioactive decay?
Answer:
gamma Rays and neutrons.
Explanation:
not one hundred percent sure.
if i put a ice cube on a table what type of phase would occur
melting
freezing
condensation
evaporation
Answer:
melting
Explanation:
the ice would turn to water before it evaporated
An atom has 16 protons and 17 neutrons.
What is the chemical symbol for the atom?
A: 33S
B: 32Cl
C: 33Cl
D: 32S
Answer:
A: 33S
Explanation:
An atom has 16 protons & 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.
Answer:
the answer is A
Explanation:
i just took quiz and got 100%
how many moles are in 23.4g?
I
A 5.29g piece of an unknown solid is placed in a graduated cylinder that initially contained 5.00mL of water, if
the water rises to 12.6mL, what is the density of this solid?
Answer:
about 0.7 g/mL
Explanation:
Density = mass ÷ volume
D = 5.29 g / (12.6 mL - 5.00 mL)
D = 5.29 g / 7.6 mL
D = 0.696052.... g/mL
D = about 0.7 g/mL
use dimensional analysis to slove; a small carton of milk contains 1 cup. if a cup equals 8 oz, how many cubic centimeters does it contain?
Answer:
236.59 cubic centimeters
Explanation:
Conversion factors:
1 cup = 8 oz
1 oz = 29.5735296 mL
1 mL = 1 cc (cubic cm)
(1 cup) x (8 oz / 1 cup) x (29.5735296 mL / 1 oz) x (1 cc / 1 mL) = 236.5882368 cc
__CH4+O2-->__CO2+__H2O
CH4 + 2O2 --> CO2 + 2H2O
On the reactant side you start with 1 carbon, 4 hydrogen, and 2 oxygen. On the product side you start with 1 carbon, 2 hydrogen, and 3 oxygen. In order to get them equal, you need to put 2 in front of the H2O which equals out the number of Hydrogen on both sides. But Now we must balance the Oxygens. Because of the H2O we now have 4 Oxygens on the product side and only 2 on the reactant. In order to balance this, we put a 2 in front of the O2 giving us 4 hydrogen on both sides, Balancing the equation
Audio and radio signals can be carried over electric wires and they are examples of ________ current. A) alternating B) direct C) pulsating D) variable
Answer:
Direct current!
Explanation:
Process of elimination, it isn't A, it isn't C, and it definitely isn't D
Answer:
A.) Alternating
Explanation:
Usatestprep
Which elements below have similar chemical properties? Nitrogen and Arsenic Sodium and Chlorine Fluorine and Aluminum Beryllium and Nickel
Answer:
A period 3 element is one of the chemical elements in the third row (or period) of the periodic ... The third period contains eight elements: sodium, magnesium, aluminium, ... This makes all eight elements analogs of the period 2 elements in the same ... Phosphorus (symbol P) is a multivalent nonmetal of the nitrogen group,
Explanation:
nfs if this is right but its worth a shot!
What is the term for a combination of two or more substances in any proportions in which the substances do not combine chemically to form a new substance.
A Mixture
B Compound
C Molecule
D Element
Calculate the density of a sample of metal that has a mass of 1668 g and takes up a volume of 186.2 cm
Answer:
8,95
Explanation:
Density is equal to mass/volume
[tex]D=\frac{m}{v} \\D= \frac{1668g}{186.2} \\D = \frac{8,95g}{cm^3} \\[/tex]
approximately
Curiosity:
Did you knew that is because of his low density that ships can fluctuate?
Despite their big mass, their volume are far greatter, so the Buoyancy Force acts heavily on them.
What is the compound P2S5 called?
Answer:
Phosphorus pentasulfide.
Explanation:
Hi. I need help with this
Thanks
List and explain the factors that determine ionization energy and atomic volume
Factors that determine ionization energy:
Electronic Repulsion - If the electronic density decreases, the ionization energy with increase and vice versa. If an electron gets released, it decreases the electronic repulsion. This makes releasing another electron harder than the first on unless the electron that is being released comes from another energetic level.# Of Energy Levels - The more energy cores that get filled up, the more ionization levels decrease. When we see the energy levels go from top to bottom, the ionization also go from most to least. This is why ionization occurs on the highest level.Nuclear Charge - The higher the atomic number, the higher charge in the nuclei. This also makes the ionization energy higher as it increases from left to right of in other words, if the nuclear charge gets higer, the energy gets higher as well.Factors that determine atomic volume:
How many protons are in the nucleus (nuclear charge)How many energy levels carry electrons (electrons in outer energy level)Best of Luck!
Define fundamental quantities.
Answer:
In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.
Explanation:
I need sum help on this
Answer:
Protons and Neutrons
Explanation:
Neutrons and protons constitute almost all of an atom's mass. The third type of stable particle is the electron. Electrons have a negative charge but are extremely small and have a mass only 1/1850 that of a proton or neutron. They are so small that for practical purposes they do not contribute to the mass of the atom.
I hope this helped!
What type of bacteria convert the
ammonia and ammonium into nitrates
and nitrites
A. Photosynthetic bacteria
B. Nitrifying bacteria
C.Nitrogen-fixating bacteria
What is the common size for beakers and flasks?
Answer:
the average size for a flask is 8 ounces.
Explanation:
i found this info on beaker:
Beaker Capacity Diameter Height
50 ml beaker 4 cm 5.5 cm
100 ml beaker 5 cm 7.2 cm
150 ml beaker 6 cm 8.5 cm
250 ml beaker 7 cm 9 cm
In what type of reaction or process does heat flow into the system?
Answer:
through thermal energy
